Equivalent Vent Length Calculation Example - Vertical - Viessmann Vitodens 100-W WB1A-24 Installation Instructions Manual

Component Installation Guide

Equivalent vent length calculation example - vertical

Fig. 71
Equivalent vent length calculation example
Single Wall Venting (Room Air Dependent)
(continued)
Equivalent vent length calculation
example (stainless steel system)
Vitodens 200-W, WB2 15-60
2 x 90º elbow
. . . . . . . . . . . . . . . . . . . . . . . . . . .
2 x 45º elbow
. . . . . . . . . . . . . . . . . . . . . . . . . . .
3 x vent pipe (0.5 m)
. . . . . . . .
2 x vent pipe (1 m)
. . . . . . . . . . . . . . . .
Total equivalent length 21.5 ft./6.5 m
Above example will change as follows
if using CPVC venting system (see
fig. 62):
2 x 90º elbow 10 ft./3.1 m
. . . . . . . . . . . . . . . . . . . .
2 x 45º elbow 6 ft./1.8 m
. . . . . . . . . . . . . . . . . . . .
3 x vent pipe (0.5 m) 4.9 ft./1.5 m
. . . . .
2 x vent pipe (1 m) 6.6 ft./2 m
. . . . . . . . .
Total equivalent length 27.5 ft./8.4 m
Note:
See also table 47.
6 ft./1.8 m
4 ft./1.2 m
4.9 ft./1.5 m
6.6 ft./2 m
77